PerformanceTrucks.net Forums

INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

heads milled .045

Thread Tools
 
Search this Thread
 
Old 02-03-2011, 11:04 PM
  #11  
TECH Addict
Thread Starter
iTrader: (10)
 
Bumpers's Avatar
 
Join Date: Nov 2005
Location: Tupelo Ms
Posts: 2,114
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by 1slow01Z71
Go out and tag the rev limiter a couple of times real hard, that is the true test.
Believe me once she's tuned up good it will prolly see the rev limiter a few times so we will get to find out how close it is lol
Bumpers is offline  
Reply Like
Old 02-04-2011, 07:50 AM
  #12  
TECH Addict
iTrader: (14)
 
Coban's Avatar
 
Join Date: Mar 2005
Location: League City, TX
Posts: 2,130
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by dmelvin
I've got a set of 243's that are milled .03 and was told that they were 59cc cambers...

Looking around I saw somewhere that .006=1cc?

I guess I'm confused as to how your's being milled down .045 would bring you to 59 and not somewhere around 56.5?

Can someone please school me?
His were actually measured, so I think his would be more true.

.006 = 1cc is really an approximation. The more you take off, the less accurate it will be. This is due to the bowl shape of the chamber.
Coban is offline  
Reply Like
Old 02-04-2011, 08:23 AM
  #13  
TECH Fanatic
iTrader: (8)
 
dmelvin's Avatar
 
Join Date: Dec 2008
Location: Rock Port, MO
Posts: 1,939
Likes: 0
Received 1 Like on 1 Post
Default
Originally Posted by Coban
His were actually measured, so I think his would be more true.

.006 = 1cc is really an approximation. The more you take off, the less accurate it will be. This is due to the bowl shape of the chamber.
Makes me wonder how big my chambers actually are then.

I figured since his were measured, they were probably accurate, I wasn't trying to say that his machinist didn't know what he was doing, I was trying to say that I didn't know what I was doing
dmelvin is offline  
Reply Like
Old 02-04-2011, 09:28 AM
  #14  
11 Second Truck Club
iTrader: (48)
 
fastrt's Avatar
 
Join Date: Jul 2007
Location: Midlothian, Texas
Posts: 1,986
Likes: 0
Received 1 Like on 1 Post
Default
I had to take .050" off my 5.3 heads to get to a 55cc chamber. I have the same cam 226/230 esp, with no ptv. I hit 7200 often, but I have arp rod bolts too.
fastrt is offline  
Reply Like
Old 02-04-2011, 12:05 PM
  #15  
TECH Addict
Thread Starter
iTrader: (10)
 
Bumpers's Avatar
 
Join Date: Nov 2005
Location: Tupelo Ms
Posts: 2,114
Likes: 0
Received 0 Likes on 0 Posts
Default
Yea the more you mill off the less cc it take out. Because of the bowl shape of the combustion chambers... The guy who done my heads builds a lot of drag and race engines and has been in business for a long time.. He knows what he's doin
Bumpers is offline  
Reply Like
Old 02-04-2011, 12:05 PM
  #16  
9 Second Club
iTrader: (7)
 
Rhino79's Avatar
 
Join Date: May 2005
Location: Cabot, AR
Posts: 3,127
Likes: 0
Received 1 Like on 1 Post
Default
I think on the LS heads its more like .007 per cc. I have helped on 2 setups that used heads with .045 cut with no fitment or ptv problems what so ever.
Rhino79 is offline  
Reply Like
Old 02-04-2011, 09:49 PM
  #17  
TECH Fanatic
iTrader: (3)
 
05gmcsierra's Avatar
 
Join Date: Mar 2010
Location: van nuys CA
Posts: 1,026
Likes: 0
Received 0 Likes on 0 Posts
Default
i got my 799s milled .030 and pat g said it was 59.5 cc chambers making my compression 10.5 on my 5.3... im running 5.3 l33 with flat top pistons tho..
05gmcsierra is offline  
Reply Like
Old 02-04-2011, 10:55 PM
  #18  
TECH Addict
Thread Starter
iTrader: (10)
 
Bumpers's Avatar
 
Join Date: Nov 2005
Location: Tupelo Ms
Posts: 2,114
Likes: 0
Received 0 Likes on 0 Posts
Default
Well I'm just sayin mine were measure with a piece of glass and a dripper and he milled them till I had 59cc chambers
Bumpers is offline  
Reply Like
Old 02-04-2011, 10:59 PM
  #19  
TECH Fanatic
iTrader: (8)
 
dmelvin's Avatar
 
Join Date: Dec 2008
Location: Rock Port, MO
Posts: 1,939
Likes: 0
Received 1 Like on 1 Post
Default
All good, didn't mean to cause confusion or argument or anything, just curious. I hope mine are 59cc, since I have have everything kinda planned out for that. lol
dmelvin is offline  
Reply Like
Old 02-04-2011, 11:03 PM
  #20  
TECH Addict
Thread Starter
iTrader: (10)
 
Bumpers's Avatar
 
Join Date: Nov 2005
Location: Tupelo Ms
Posts: 2,114
Likes: 0
Received 0 Likes on 0 Posts
Default
Everyone said different numbers.. I've heard 30. 35. 40 etc

Pat said 59cc chambers was 10.8 with a stock head gasket but everyone else said 11to1
Bumpers is offline  
Reply Like



Advanced Search
Quick Reply: heads milled .045


Reply Closed Thread Share

All times are GMT -5. The time now is 04:24 PM.